EP2816638A1 - Wiederaufladbare Batterie - Google Patents

Wiederaufladbare Batterie Download PDF

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Publication number
EP2816638A1
EP2816638A1 EP14155603.5A EP14155603A EP2816638A1 EP 2816638 A1 EP2816638 A1 EP 2816638A1 EP 14155603 A EP14155603 A EP 14155603A EP 2816638 A1 EP2816638 A1 EP 2816638A1
Authority
EP
European Patent Office
Prior art keywords
rechargeable battery
electrode assembly
lead tab
connecting portion
battery according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14155603.5A
Other languages
English (en)
French (fr)
Other versions
EP2816638B1 (de
Inventor
Seung-Ho Kwak
Yong-Chul Seo
Min-Hyung Guen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
Original Assignee
Samsung SDI Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung SDI Co Ltd filed Critical Samsung SDI Co Ltd
Publication of EP2816638A1 publication Critical patent/EP2816638A1/de
Application granted granted Critical
Publication of EP2816638B1 publication Critical patent/EP2816638B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/049—Processes for forming or storing electrodes in the battery container
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to a rechargeable battery.
  • rechargeable batteries include an electrode assembly for charging and discharging, a case containing the electrode assembly and an electrolyte solution, a cap plate coupled to the opening of the case, and a lead tab electrically connecting the electrode assembly to electrode terminals.
  • the side retainer may have a first side covering the lead tab in the direction facing the end surface of the uncoated portion of the electrode assembly, and a second side and a third side protruding from both sides of the first side and coupled to the lead tab.
  • the insertion guide may connect the first side, at an angle, to the second side and the third side inclined towards the electrode assembly.
  • the side retainer may have a first side covering the lead tab in the direction facing the end surface of the uncoated portion of the electrode assembly, and a second side and a third side protruding from both sides of the first side and coupled to the lead tab.
  • the side retainer may have a gap absorbing portion protruding between the second side and the third side inside the first side and supporting the inner sides of the second connecting portions facing each other of the second and third sides.
  • the insertion guide may be formed by chamfering the end of the first side to the electrode assembly.
  • the side retainers are coupled to the lead tabs coupled to the electrode assembly and the side retainers have the inclined insertion guides, the electrode assembly is safely inserted into the opening of the case by the insertion guide.
  • the electrode assembly 10 is formed by disposing electrodes (for example, a cathode 11 and an anode 12) on both sides of a separator 13, which is an insulator, and winding the cathode 11, the separator 13, and the anode 12 in a jelly roll.
  • electrodes for example, a cathode 11 and an anode 12
  • the uncoated portion 11 b of the cathode 11 is formed at one end of the cathode 11 along the wound cathode 11.
  • the uncoated portion 12b of the anode 12 is formed at one end of the anode 12 along the wound anode 12.
  • the uncoated portions 11 band 12b are disposed at ends of the electrode assembly 10.
  • the case 15 is a substantially rectangular parallelepiped with a space for containing the electrode assembly 10.
  • the opening of the case 15 is formed at one side of the rectangular parallelepiped and allows the electrode assembly 10 to be inserted into the space from the outside.
  • the cap plate 20 is disposed on the opening of the cap 15 and seals the case 15.
  • the case 15 and the cap plate 20 may be made of aluminum and welded to each other. That is, the cap plate 20 may be welded to the opening of the case 15, after the electrode assembly 10 is inserted in the case 15.
  • the cap plate 20 has one or more openings, and for example, has the terminal holes H1 and H2 and a vent hole 24.
  • the electrode terminals 21 and 22 are disposed in the terminal holes H1 and H2 of the cap plate 20, respectively, and electrically connected to the electrode assembly 10.
  • the electrode terminals 21 and 22 are electrically connected to the cathode 11 and the anode 12 of the electrode assembly 10, respectively. Accordingly, the electrode assembly 10 can be exposed to the outside of the case 15 by means of the electrode terminals 21 and 22.
  • the plate terminals 21 c and 22c have through-holes H3 and H4, respectively.
  • the rivet terminals 21 a and 22a are inserted in the through-holes H3 and H4 from above through the terminal holes H1 and H2,
  • the electrode terminals 21 and 22 further have flanges 21 b and 22b, respectively, which are formed wide integrally with the rivet terminals 21 a and 22a inside the cap plate 20.
  • the insulating member 31 and the plate terminal 21 c are fastened to the upper end of the rivet terminal 21 a by coupling the insulating member 31 and the plate terminal 21 c to the upper end of the rivet terminal 21 a and then riveting or welding the upper end.
  • the plate terminal 21 c is disposed outside the cap plate 20 with the insulating member 31 therebetween.
  • the top plate 46 and the plate terminal 22c are fastened to the upper end of the rivet terminal 22a by coupling the top plate 46 and the plate terminal 22c to the upper end of the rivet terminal 22a and then riveting or welding the upper end.
  • the plate terminal 22c is disposed outside the cap plate 20 with the top plate 46 therebetween.
  • the lead tabs 51 and 52 have the same structure and the side retainers 53 and 54 have the same structure in the first embodiment, for the convenience, the lead tab 51 connected to the cathode 11 of the electrode assembly 10 and the side retainer 53 coupled to the lead tab 51 are exemplified in the following description.
  • the side retainer 53 has a first side 531 covering the side of the lead tab 51 in the direction (x-axial direction), facing the end surface of the uncoated portion 11 b of the electrode assembly 10, and a second side 532 and a third side 533 protruding from both sides of the first side 531 and fitted on the inner sides across the end surface of the lead tab 51.
  • the insertion guide 60 is formed by connecting the first side 531, at an angle, to the second side 532 and the third side 533 inclined towards the electrode assembly 10. That is, in FIGS. 3 and 4 , the first side 531 comes gradually close to the electrode assembly 10 from the upper end to the lower end.
  • a gap is defined between the side retainer 53 and the opening of the case 15 by the insertion guide 60.
  • the gap allows the electrode assembly 10 to be easily inserted into the opening of the case 15.
  • the second and third sides 532 and 533 have locking protrusions 534 and 535 on the inner sides facing each other, respectively.
  • the locking protrusions 534 and 535 are locked to the inner sides across the end surface of the first connecting portion 511 of the lead tab 51, thereby fixing the side retainer 53 to the first connecting portion 511.
  • the second and third side 532 and 533 cover the end surface of the first connecting portion 511 and simultaneously cover the side of the second connecting portion 512.
  • a lead tab 71 has a first connecting portion connected to an electrode terminal 21 in parallel with the cap plate 20 and a second connecting portion 712 bending down from the first connecting portion 711 away from the cap plate 20 and welded in surface contact with an end surface of the uncoated portion 11 b of the electrode assembly 11b.
  • a side retainer 53 has a first side 531 covering the wider side of the lead tab 71 in the direction (x-axial direction), facing the end surface of the electrode assembly 10, and a second side 532 and a third side 533 protruding from both sides of the first side 531 and fitted on the inner sides across the narrower end surface of the lead tab 71.
  • the side retainer 53 is recessed, corresponding to the lead tab 71, and receives the lead tab 71.
  • the first side 531 covers the wider side of the second connecting portion 712 of the lead tab 71.
  • the second and third sides 532 and 533 cover the narrower end surfaces of the second connecting portion 712 of the lead tab 71.
  • Locking protrusions 534 and 535 are locked to the inner sides across the end of the second connecting portion 712 of the lead tab 51, thereby fixing the side retainer 53 to the second connecting portion 712.
  • the second and third sides 532 and 533 cover the end surfaces of the second connecting portion 712.
  • the first side 531 has a reinforcing portion 536 thicker than the other portions, on the inner side.
  • the reinforcing portion 536 is in close contact with the side of the second connecting portion 712 and the locking protrusions 534 and 535 are in close contact with the inner side of the second connecting portion 712. That is, the lead tab 71 and the side retainer 53 can be maintained in a strong coupling state.
  • FIG. 7 is a cross-sectional view of a rechargeable battery according to the third embodiment of the present invention
  • FIG. 8 is an exploded perspective view of a lead tab and a side retainer shown in FIG. 7
  • FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8 .
  • side retainers 55 and 56 each have a first side 551 covering the lead tab 51 in the direction (x-axial direction), facing the end surface of the electrode assembly 10, and a second side 552 and a third side 553 protruding from both sides of the first side 551 and fitted on the inner sides across the end surface of the lead tab 51.
  • the insertion guide 63 is formed by chamfering the end of the first side 551 to the electrode assembly 10. Accordingly, when the electrode assembly 10 is inserted in the case 15, a gap is defined between the side retainer 55 and the opening of the case 15 by the insertion guide 63. The gap allows the electrode assembly 10 to be easily inserted into the opening of the case 15.
  • the lead tab 51 and the electrode assembly 10 covered by the side retainer 55 are not in contact with the opening of the case 15. Therefore, damage to the electrode assembly 10 during assembly of the rechargeable battery.
  • the first side 551 has a reinforcing portion 556 thicker than the other portions, on the inner side.
  • the reinforcing portion 556 is inserted in between the second connecting portions 512 and the locking protrusions 554 and 555 are in close contact with the inner sides of the first connecting portion 511. That is, the lead tab 51 and the side retainer 55 are maintained in a strong coupling state.
  • the side retainer 55 of the third embodiment further has a gap absorbing portion 557.
  • the gap absorbing portion 557 protrudes between the second side 552 and the third side 553 inside the first side 551 and supports the inner sides of the second connecting portions 512 facing each other of the second and third sides 552 and 553. Therefore, the gap between the side retainer 55 and the lead tab 51 is absorbed and the side retainer 55 is firmly combined with the lead tab 51.
  • FIG. 10 is an exploded perspective view of a lead tab and a side retainer in a rechargeable battery according to the fourth embodiment of the present invention
  • FIG. 11 is a cross-sectional view taken along line XI-XI of FIG. 10
  • FIG. 12 is a cross-sectional view taken along line XII-XII of FIG. 11 .
  • the side retainer 57 further has support protrusions 578 protruding from the side of a gab absorbing portion 577.
  • the support protrusions 578 support the inner sides of the second connecting portion 512, inside the second side 572 and the third side 573.
  • the support protrusions 578 protrude from the gap absorbing portion 577 toward the second side 572 and the third side 573, inside the first side 571, and support, in line contact with, the inner sides facing each other of the second connecting portion 512
  • the uncoated portion 11 b is disposed between the second side 572 and the second connecting portion 512 at one side and between the third side 573 and the second connecting portion 512 at the other side.
  • the uncoated portion 11 b is electrically connected to the connecting portions 512.
  • the lead tabs may have different thicknesses at the cathode and the anode and the second connecting portions of the lead tabs may have different gaps.
  • the support protrusions allow side retainers to be used for the lead tabs having different thicknesses and the second connecting portions having different gaps.
  • FIG. 13 is a cross-sectional view of a rechargeable battery according to the fifth embodiment of the present invention
  • FIG. 14 is an exploded perspective view of a lead tab and a side retainer shown in FIG. 13
  • FIG. 15 is a cross-sectional view taken along line XV-XV of FIG. 14 .
  • side retainers 57 and 58 have all of the features of the configurations of the side retainers 53, 54, 55, 56, and 57 of the first to fourth embodiments.
  • the side retainer 57 has first, second, and third sides 571, 572, and 573, fitting protrusions 574 and 575, an insertion guide 60, a gap absorbing portion 577, a support protrusion 578, and a reinforcing portion 576.
  • the side retainer 57 can achieve the operational effects by the side retainers 53, 54, 55, 56, and 57 of the first to fourth embodiments.
  • Electrode assembly 11 Cathode 11a, 12a: Coated portion 11b, 12b: Uncoated portion 12: Anode 13: Separator 15: Case 20: Cap plate 21, 22: Electrode terminal 21a, 22a: Rivet terminal 21b, 22b: Flange 21c, 22c: Plate terminal 24: Vent hole 25: Vent plate 25a: Notch 31: Insulating member 36, 37: Gasket 46: Top plate 51, 52, 71: Lead tab 53, 54, 55, 56, 57, 58: Side retainer 60, 63: Insertion guide 61, 62: Insulating member 73, 74: Through-hole 100, 200, 300: Rechargeable battery 511, 711: First connecting portion 512, 712: Second connecting

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Secondary Cells (AREA)
EP14155603.5A 2013-06-19 2014-02-18 Wiederaufladbare Batterie Active EP2816638B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361837031P 2013-06-19 2013-06-19
US14/099,823 US10333113B2 (en) 2013-06-19 2013-12-06 Rechargeable battery having retainer

Publications (2)

Publication Number Publication Date
EP2816638A1 true EP2816638A1 (de) 2014-12-24
EP2816638B1 EP2816638B1 (de) 2018-08-29

Family

ID=50112848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14155603.5A Active EP2816638B1 (de) 2013-06-19 2014-02-18 Wiederaufladbare Batterie

Country Status (5)

Country Link
US (1) US10333113B2 (de)
EP (1) EP2816638B1 (de)
JP (1) JP6444064B2 (de)
KR (1) KR102183337B1 (de)
CN (1) CN104241560B (de)

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KR102264701B1 (ko) * 2016-07-20 2021-06-11 삼성에스디아이 주식회사 이차전지
KR102284570B1 (ko) * 2016-09-06 2021-08-02 삼성에스디아이 주식회사 이차 전지
JP6950406B2 (ja) * 2017-09-27 2021-10-13 株式会社Ｇｓユアサ 蓄電素子
JP7059548B2 (ja) * 2017-09-27 2022-04-26 株式会社Ｇｓユアサ 蓄電素子
CN111969166B (zh) * 2018-01-16 2022-11-29 宁德时代新能源科技股份有限公司 集流构件和电池
JP7230537B2 (ja) * 2018-01-31 2023-03-01 株式会社Ｇｓユアサ 蓄電素子
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WO2022044672A1 (ja) * 2020-08-26 2022-03-03 株式会社村田製作所 二次電池およびその製造方法
CN219226428U (zh) * 2021-10-22 2023-06-20 株式会社Lg新能源 圆筒形电池、包括该圆筒形电池的电池组及汽车
CN216850246U (zh) * 2021-12-30 2022-06-28 深圳市科达利实业股份有限公司 一种电池引脚及电池盖板
KR102676180B1 (ko) * 2022-04-05 2024-06-19 주식회사 엘지에너지솔루션 각형 이차전지

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024028491A1 (en) * 2022-08-05 2024-02-08 Northvolt Ab Current collector for a battery cell

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KR102183337B1 (ko) 2020-11-26
EP2816638B1 (de) 2018-08-29
US10333113B2 (en) 2019-06-25
JP2015005505A (ja) 2015-01-08
JP6444064B2 (ja) 2018-12-26
CN104241560B (zh) 2019-04-19
CN104241560A (zh) 2014-12-24
KR20140147660A (ko) 2014-12-30
US20140377639A1 (en) 2014-12-25

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